What is the midpoint of a segment who's endpoint are (-3,-3)and (-13,-13)

Use the midpoint formula.  Find the x-values and y-values of the each coordinate pair.  You already know what they are. The first coordinate pair is x1 and y1.  The second coordinate pair is called x2 and y2.  Add the first x-value and the second x-value and divide by 2.  Then add the first y-value and second y-value and divide by 2.  If my directions are correct then your should find the midpoint!  Good luck!  I hope this makes senses.  And if I'm wrong, blame my past math teachers.  You can also look online.  

Joe ran 130 yards because 3 feet make 1 yard so using this ratio 390 feet make 130 yards.